N. Koizumi defeated Yuta Kawahashi in the Round of 32 at the M15 Wuning 5 (hard) tournament. The match ended with Koizumi leading 6-5 when Kawahashi retired. Koizumi hit 2 aces and did not commit a double fault, while Kawahashi had 2 double faults and converted 50% of his break points.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-07-02 | M15 Tokyo 1 | R32 | hard | N. Koizumi | 7-5 6-3 |
| 2025-06-05 | M15 Karuizawa 1 | R16 | clay | Yuta Kawahashi | 6-3 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.
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